CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
CURRENT ASSETS:
Cash and cash equivalents	$ 41,717	$ 46,074
Restricted cash	4,276	4,213
Short-term investments	24,344	14,758
Accounts receivable, less allowance for credit losses of $34,677 and $28,560 at September 30, 2023 and December 31, 2022, respectively	40,261	37,175
Inventories	2,935	2,618
Prepaid expenses and other current assets	6,945	4,738
Assets held for sale	10,198	4,559
Total current assets	130,676	114,135
PROPERTY, EQUIPMENT AND FACILITIES - At cost, net of accumulated depreciation and amortization of $139,697 and $146,367 at September 30, 2023 and December 31, 2022, respectively	38,402	23,940
OTHER ASSETS:
Noncurrent receivables, less allowance for credit losses of $17,274 and $6,810 at September 30, 2023 and December 31, 2022, respectively	16,703	22,734
Deferred income taxes, net	25,210	22,312
Operating lease right-of-use assets	92,866	93,097
Goodwill	10,742	14,536
Other assets, net	1,179	812
Total other assets	146,700	153,491
TOTAL ASSETS	315,778	291,566
CURRENT LIABILITIES:
Unearned tuition	21,844	24,154
Accounts payable	17,582	10,496
Accrued expenses	12,670	8,653
Income taxes payable	3,052	2,055
Current portion of operating lease liabilities	10,917	9,631
Other short-term liabilities	35	31
Total current liabilities	66,100	55,020
NONCURRENT LIABILITIES:
Pension plan liabilities	622	668
Long-term portion of operating lease liabilities	91,891	91,001
Total liabilities	158,613	146,689
STOCKHOLDERS' EQUITY:
Common stock, no par value - authorized 100,000,000 shares at September 30, 2023 and December 31, 2022, issued and outstanding 31,359,110 shares at September 30, 2023 and 31,147,925 shares at December 31, 2022.	48,181	49,072
Additional paid-in capital	47,536	45,540
Retained earnings	62,487	51,225
Accumulated other comprehensive loss	(1,039)	(960)
Total stockholders' equity	157,165	144,877
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 315,778	$ 291,566